Developers, apparently you do not know now to perform UX testing, so let me try to help a little bit. Your goal absolutely must be to make Skitch feel precisely like 1.x of the app. 1.x, as you can see, is something that EVERYONE loved. The only good reviews I've seen (save a couple) are from folks who never used 1.x. So, here you go:
• Allow us to rename Skitch 1.0 to "Skitch 1.app" and run it along side of Skitch 2 (that way we don't feel forced and can compare). Right now we have to start Skitch 2 first and then start Skitch 1 in order for this to work as ignorant Skitch 2 thinks Skitch 1 isn't supposed to be running.
• Put a tool resizer ON the interface so that we can shrink and enlarge our arrows and fonts like we used to be able to do (http://cl.ly/image/0u3X3V242n1z).
• Give us the ability to define transparent backgrounds for our creations. Frequently we want to have transparent alpha pngs (http://cl.ly/image/1P111v143w3p).
• Make scaling and cropping work like before (even if you have a crop button, give us the ability to do it like we USED to as it is MORE INTUITIVE) (http://cl.ly/image/1S2O1w3I0X30).
• Allow us to name like we used to (http://cl.ly/image/2S2S2S2T2M0M) - it does not appear that now we can rename files properly as you just have a silly title that doesn't stick as the filename when dragging it out to other apps and you just have an ugly "Drag Me (size x size)" area; at least make it like the old Skitch where you can insert a filename there. That makes intuitive logical sense.
• Make your bordering narrower; compare old to new: http://cl.ly/image/200w1L422H1p
• Give us the old paint bucket back and make it work like it did before so we can fill spaces: http://cl.ly/image/1F0Z1d3M153F
• Your selection mechanism is not as good as before. For example, having a selection arrow and being able to draw rectangles or arrows upon arrows (ie, other shapes) was a better way with more fine grained control (http://cl.ly/image/2f0a0J3h0M2S).
• Capture Safari pages and USE Safari cookies so that if you are logged in on Safari, it will actually be logged in on Skitch (thus allowing the capture of admin pages, etc.)
I could probably provide several more points, however this is a good start. The idea here, as you can see, is to emulate the old version as closely as possible as you have a lot of users who want this. Listening to users is never a bad thing when they know your product better than you do. We have been a very passionate and dedicated userbase for Skitch and fell in love with the app and it's cool little heart icon. We want back what we loved; that's not too much to ask for and it is not too hard to accomplish if you just listen and study.